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(A) Housing effects on hen house egg production performance in the ED trial, (B) Housing effects on hen house egg production performance in the CLD trial, and (C) Dietary effect on mean hen house egg production performance in two different housing systems. The values are means ± standard error of the mean. Significance level: ***P < 0.01 = highly significant, **p < 0.05 = significant, NS = non-significant. Abbreviations: ED, Experimental diet; CLD, commercial layer diet.
